package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration {
    public  void  work (BookList bookList) {

        System.out.println("删除图书...");
        System.out.println("请输入你要删除图书的书名");
        Scanner scanner=new Scanner(System.in);
        String bookName=scanner.nextLine();
        int currentSize=bookList.getUsedSize();
        int pos=-1;
        int i=0;
        for(;i<currentSize;i++){
            Book book=bookList.getBooks(i);
            if (book.getName().equals(bookName)) {
            //找到了，记录下标
            pos=i;
            break;

            }
        }
        if(i<currentSize){
            //删除
            for (int j=pos;j<currentSize-1;j++){
                //bookList[j]=bookList[j+1];
                Book book=bookList.getBooks(j+1);
                bookList.setBooks(j,book);
            }
        }else{
            System.out.println("没有要找的书");
            return;
        }
        bookList.setUsedSize(currentSize-1);
        bookList.setBooks(currentSize-1,null);

    }
}